Reaming-machine.



F. T. GURRIER. REAMING MACHINE. APPLICATION FILED MAR. 18, 1907.

1,098,099. Patented May 26, 191% l n|||||| Iii! \A ifnesses ITIDGHI'IOT' E2 3 p um FTGTIR l. Eur ier A1; mrney FRANK '1. GURRIER, OF WORCESTER, MASSACHUSETTS.

REAMING-MACHINE.

eas es.

Specification of Letters Patent.

Patented May at, 1914..

App1ication filed March 18, 1907. Serial No. 362,939.

To all whom it may concern Be it known that I, FRANK T. CURRIER, a citizen of the United States, residing at W'orcester, in the county of lVorcester and Commonwealth of Massachusetts, have 1nvented certain new and useful Improvements in Beaming-Machines, of which the following is a specification accompanied by drawings, forming a part of the same, in which Figure l is a front view of a reaming machine embodying my invention. Fig. 2 is a side view of the same. Fig. 3 is a detached top view of the face plate, and Fig. 4: is a side view of the same.

Similar reference letters and figures refer to' similar parts in the different views.

My invention relates to improvements in a reaming machine by which I obtain greater accuracy of operation and also facilitate the manipulation of the work, and it consists in the construction and arrangement of parts as hereinafter described and pointed out in the annexed claims.

Referring to the'accompanying drawings 1 denotes the base of the machine, on which is mounted a vertical supporting framework 2. J ournaled in a bearing 3 in the lower end is a hollow shaft 4, in which is placed a center 5 inthe well known manner, and attached to which is a face plate 6. The

shaft 1 is provided with a worm gear 7 engaging a worm on a shaft 8 provided with tight and loose pulleys 9 and 9*. Mounted in a bearing 10 in the upper horizontal end of the frame 2 is a vertically reciprocating hollow sleeve 11, in which the shank 12 of the spindle 13 carrying the center 14 is held by a set screw 15. The sleeve 11 is reciprocated by apinion l6 engaging a rack 17 on the sleeve 11. The pinion 16 is held on a shaft 18 provided with a hand wheel 19 and mounted in a split bearing 20 which may be tightened by the set screw 21. In this way the pinion may be held from rotating and the spindle 13 held at any desired height. The sleeve 11 is vertically adjusted to hold a reamer 22 having cutting blades 23 between thecenters 5 and 14: having coincident vertical axes.

The face plate 6 is provided with a reamer driving mechanism which I term an equalizer, constructed as follows :Placed loosely on the square end 24 of the reamer 22 is a dog 25, which rests on a ring 26 supported on disks 27 pivoted eccentrically at 28, 28,

to the face plate 6. The disks 27 are each provided: with a driving pin 29 which engages the dog 25, thereby rotating the reamer 22 with the rotation of the face plate 6. Radial movement of the pins 29 to equalize inequalities of driving strains between the Y adjustable on a rod 81 attached to the frame 2, when the reamer is placed in position ready for work.

The operation of my improved reamer is as follows: A spindle 13, slightly smaller than the hole in the work to be reamed, is inserted in the sleeve 11, and the set screw 15 is tightened. The work a, having the hole to be reamed, is then slipped over the spindle 13 and is held by the arm 30 which hasfirst been adjusted to the proper height. A reamer 22 of the desired diameter of hole is then placed between the centers 5 and 14 and the sleeve 11 is adjusted to bring the centers at the proper distance to hold the reamer 22. The sleeve 11 is then held in position by tightening the set screw 21. The arm 30 is then swung out of contact with the work a which is allowed to descend by gravity into engagement with the reamer 22, which is slightly tapering at its upper end. Rotary motion is then imparted to the reamer through the dog 25 by the disks 27 and driving pins 29 on the face plate 6. The work a is held from rotation by the operator and allowed to gradually descend as the reaming operation proceeds, being fed by gravity on the reamer 22. In this way I insure absolute equality of feed and also by the vertical position of the reamer obviate its irregular operation caused by an unequal distribution of the weight of the work upon the reamer. I provide a compensation for further unequal rotating strains upon the reamer by my improved drive which antomatically equalizes itself, by varying the radial position of the driving pins 29 to the dog 25 as required.

I claim,

1. In a reaming machine, a reamer held in a vertical position, means applied to the lower end of said reamer for rotating the same, an arm for temporarily supporting the work, a spindle in axial alinement with said reamer and above the reamer for maintaining the work with the hole to be reamed in alinement with the reamer, the work being capable of sliding oii said spindle and upon said reamer by gravity.

2. In a reaming machine, a vertical reamer held between alined centers, with its upper end arranged to receive the work, rotating means applied to the lower end of the reamer, a spindle above the reamer with its axis in alinement with the axis of the reamer, said spindle being adapted to aline the work with the reamer and allow it to descend by gravity upon the reamer.

3. In a reaming machine, a vertical reamer, means for rotating said reamer, a spindle provided with a center for supporting the upper end of the reamer and adapted to pass through the hole to be reamed and allow the work to descend over the reamer by gravity with its line of descent determined by the reamer.

4. In a reaming machine, a reamer held between centers having coincident vertical axes, means above said reamer for holding the work with the hole to be reamed in alinement with said reamer and for allowing the downward movement of the work by gravity upon said reamer, a rotating shaft arranged to support the lower of said centers, and means between said shaft and the lower end of said reamer for equalizing the driving strains upon said shaft by said reamer.

5. In a reaming machine, a reamer held between centers having coincident vertical axes, means for maintaining the work above said reamer with the hole to be reamed in alinement with the reamer and for allowing the downward movement of the work by gravity, and means for rotating said reamer arranged below the lower of said centers and comprising means for equalizing the driving strains from said reamer.

6. In a reaming machine, areamer held in a vertical position, a spindle held above said reamer with the diameter of said spindle slightly less than the hole in the work to be reamed, said spindle arranged to hold said hole in alinement with said reamer and to allow the downward movement of the work upon said reamer, a rotating shaft below said reamer for supporting said reamer, and means between said shaft and said reamer for rotating said reamer from said shaft with equalized strains upon said shaft, thereby insuring the accuracy of the rotation of the reamer.

Dated the ninth day of March 1907.

FRANK T. CURBIER.

Witnesses RUFUS B. FOWLER, HENRY WOOD FOWLER.

Copies of thin patent may be obtained for five cents each, 'by addressing the "Commissioner of Patents, Washington, D. C. 

